20704480 has 24 divisors (see below), whose sum is σ = 48914712. Its totient is φ = 8281728.

The previous prime is 20704469. The next prime is 20704499. The reversal of 20704480 is 8440702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64542 + ... + 64861.

It is an arithmetic number, because the mean of its divisors is an integer number (2038113).

Almost surely, 2^20704480 is an apocalyptic number.

20704480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20704480 is an abundant number, since it is smaller than the sum of its proper divisors (28210232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20704480 is a wasteful number, since it uses less digits than its factorization.

20704480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129418 (or 129410 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 20704480 is about 4550.2175772154. The cubic root of 20704480 is about 274.5921447160.

The spelling of 20704480 in words is "twenty million, seven hundred four thousand, four hundred eighty".